摘要
为了研究多馈入直流系统中换流母线电压之间的相互影响,以交直流系统潮流计算为基础,推导得出了多馈入直流系统换流母线电压相互影响的关系式。然后据此分析研究了某条或某几条换流母线附近发生故障是否会引起多个换流站同时换相失败,并推导得到了相应的临界电气距离。最后,以CIGRE HVDC标准模型为基础构建三馈入直流输电系统模型,并用PSCAD进行仿真分析,验证了换流母线电压相互影响关系式的合理性。
For researching the interaction among converter buses in MIDC （ Multi - Infeed Direct Current） system, the converter bus voltage interaction formula of MIDC is deduced based on power flow equation of AC/DC system. And then, according to the formula, whether the faults of one or several converter buses will lead to the occurrence of commutation failure in other direct current systems is analyzed, meanwhile the critical electrical distance is also deduced. At last, a three - infeed HVDC （high voltage direct current） model is constructed according to the CIGRE HVDC, and then the model is simulated and analyzed by PSCAD. According to the result of simulation, it shows that the converter bus voltage interaction formula is reasonable.
出处
《四川电力技术》
2009年第4期11-15,64,共6页
Sichuan Electric Power Technology
基金
国家重点基础研究专项经费资助项目(2004CB217907)
国家科技支撑计划项目(2008BAA13B01)
关键词
多馈入直流
换流母线电压
相互影响
换相失败
临界电气距离
multi -infeed HVDC
converter bus voltage
interaction
commutation failure
critical electrical distance
